Writing implement.



F. W. KUEHN.

WRITING IMPLEMENT.

APPLICATION FILED ocr. 25. 1911.

Patented J um: 18, 1918.

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Elnuentoz UNITED srA'rEs Parana orrion FREDERICK W. K'UEHN, OF ST. LOUIS, MISSOURI.

wnrrme IMPLEMENT.

Specification of Letters Patent.

Patented June 18, 1.918.

Application filed October 25, 1917. Serial 160. 198,423.

This invention relate to fountain pens,

more particularly to that class of fountain ens adapted to be used for writing or printmg signs or posters, or for producing heavy lettering or writing or. various styles.

The object of this invention is to produce an improved en of the above-mentioned class which wil be simple and compact in structure, peculiarly adapted for the char- .acter of work for which it is constructed,

and be at the same time economical in manu-- facture.

My invention contemplates the rovision of a novel nib and holder which wi l readily execute strokes of varying widths and at the same time permit a supply of ink sufiicient for the stroke desired.

My invention further contemplates a. novel, simple and effective means for regulating the sup 1y of ink to the nib.

I attain t e above and other objects by a mechanical construction which will be hereinafter specifically described by reference to the drawings wherein,

Figure 1 is a longitudinal view of the entire pen, the casing, collar and connecting mom or being shown in section.

Fig. 2 is a sectional end View of the pen on the line 2-2 of Fig. 1.

Fig. 3 is a longitudinal sectional view of a section of the pen taken at right angles to the View shown in Fig. 1.

Fig. 4 is a side elevational view of the connecting member 3.

Fig. 5 is a detail. plan view of the nib.

Fig. 6 is a front end view of the nib.

Fig. 7 is a rear end. view of the nib.

Fig. 8 is a Vie of the clamping surface of one of the jaws.

Fig. 9 is a sectional view of the two com plemental jaw sections.

Fig". 1.0 is a view of the valve 11.

Fig. 11 is a view of a section of the pen showing the reduced portion of the valve stem.

Referring to the drawings, wherein like numerals designate like parts in the several. views, 1 desi ates a hollow casing or reservoir interns y .threaded, at one end for the reception of a connecting member, 3, circumferentially threaded at both sides of an annular flange, 4, knurled upon its periphery so as to permit a tight grip when inserting the connecting member into the end of the casing. One end, 5, of the connecting member, 3, is adapted to enter the casing and engage the threads therein, the flange being used for a grip when screwing the end 5 into the casing. The other end, 6, of the connecting portion is slotted to receive the jaws 7, 7' which in turn hold between them the nib or on point 8. A collar, 9, with 5 threads 4 and slightly tapered bore fits over the slotted end of the connecting member and clamps the same about the jaws, which are corrugated upon their inner surfaces for a purpose hereinafter set forth. Each of these complemental jaw sections gradually thickens in cross-section from its lower end toward its base and is provided with a smooth and semi-circular outer surface to snugly conform the curve of the inner circumference of the connecting member.

The nib, or pen point, 8, is at one end. provided with a plurality of longitudinal slits extending about of the length of the nib so that but a slight pressure exerted upon the nib in writing, will broaden the same at its writing point and permit the making of a mark of a width in proportion to the pressure exerted.

This nib, 8, is of the same width in crosssection from its writing point to its upper end and beginning with the end of the slits, is corrugated upon both faces. Them corrugations and the raised portions upon the inner surfaces of the jaws provide suitable channels for the passage of the ink from the casing to the nib which, being corrugated upon both of its faces, is fed with the fluid upon both sides, thus insuring a supply of ink in suflicicnt quantity for the mark which is to be produced.

The upper end of the casing, 1, is provided with an opening into which 1s fitted a valve stem, 10, extending longitudinally throu h the casing and which is substantially t e same diameter as the opening, so as to snugly fit into said opening. This stem is provided atone end with a disk valve 11, shown in the drawings to be peripherally serrated in order to permit the ink to pass from the reservoir to the opposite side of the valve 11, in a percolating drop flow, rather than in a. steady and unbroken stream. The serrathereby regulate the ow of marking fiuid.'

7. In a fountain pen having a casing, a connecting member, jaws within said connecting member, a nib having a plurality of longitudinal slits at its point and corrugations upon both faces whereby the pen may be fed with writing fluid upon both of its faces.

8. A fountain pen having a casing with I an o enin in the top thereof, a connecting I'nem er a apted to be inserted in the lower end of the casing, jaws held within said connecting member, a nib held between said jaws, a valve within said casing and a valve stem extending through the o ening in the top of the casing and adapte to close said opening, said stem having an intermediate portion gradually reduced in diameter from its top toward the valve, and a nut upon the end of said valve stem for raising said ,valve and bringing the reduced portlon of the stem into said opening whereby air may be admitted to the casing.

In testimony whereof I have hereunto set my hand.

FREDERICH W. KUEHN. 

